After many months of designing, coding, reviewing, testing and documenting, Qt 4.7.0 is finally ready for the big time. Although it's a little more than nine months since Qt's last feature release (4.6.0 on December 1, 2009), the seeds of some of the new stuff in 4.7 were sown much earlier. Indeed, many of the ideas behind the biggest new feature in Qt 4.7.0, Qt Quick, were born more than two years ago, not long after Qt 4.4 was released

Just use GTK then. I don't think we really need yet another GUI library.

Let's see. Is there a c++ GUI library that:

1) does not have proprietary language extensions?
2) does not depend on external tools?
3) is only about GUI?
4) follows object-oriented principles cleanly?
5) reuses the STL or STL-like principles?
6) reuses the native widgets?

Let's take one library at a time:

a) Qt fails at #1 and #2 and #3 and #5 and #6.
b) GTK is C, not C++; GTKMM has some serious problems (even the authors say don't use the latest version, it contains serious regressions).
c) MFC fails at #3, #4 and #5.
d) ATL/WTL fails at #4 and #5.
e) wxWidgets fail at #4 and #5.